US20050198660A1 - Optical pickup moving mechanism and disk drive using the same - Google Patents

Optical pickup moving mechanism and disk drive using the same Download PDF

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Publication number
US20050198660A1
US20050198660A1 US11/038,028 US3802805A US2005198660A1 US 20050198660 A1 US20050198660 A1 US 20050198660A1 US 3802805 A US3802805 A US 3802805A US 2005198660 A1 US2005198660 A1 US 2005198660A1
Authority
US
United States
Prior art keywords
optical pickup
disk
moving mechanism
stepping motor
radial direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/038,028
Other languages
English (en)
Inventor
Chung-ung Kim
Pil-je Cho
Young-sun Jung
Kyu-hyeong Lee
Sung-Hun Lee
Young-woo Huh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHO, PIL-JE, HUH, YOUNG-WOO, JUNG, YOUNG-SUN, KIM, CHUNG-UNG, LEE, KYU-HYEONG, LEE, SUNG-HUN
Publication of US20050198660A1 publication Critical patent/US20050198660A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/0857—Arrangements for mechanically moving the whole head
    • G11B7/08582—Sled-type positioners
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection

Definitions

  • the present invention relates to a disk drive, and more particularly to an optical pickup moving mechanism that can linearly move an optical pickup in a radial direction of a disk.
  • a disk drive is a device that writes and reads information to and from a disk.
  • the disk drive includes an optical pickup moving mechanism to move an optical pickup in a radial direction of the disk.
  • FIG. 1 is a rear view that illustrates an example of a conventional sub-chassis assembly.
  • a sub-chassis assembly 100 includes a sub-chassis 101 , a turntable 111 driven by a spindle motor 110 and rotating an optical disk 103 concentrically mounted thereon, an optical pickup 120 that linearly moves in a radial direction of the optical disk 103 to write and read information to and from the optical disk 103 , and an optical pickup moving mechanism that linearly moves the optical pickup 120 in a radial direction of the optical disk 103 .
  • the optical pickup moving mechanism includes a pair of guide shafts 141 and 142 installed in parallel with each other at the sub-chassis 101 to be separated from each other by a predetermined distance and guiding the linear motion of the optical pickup 120 in a radial direction of the optical disk 103 , a lead screw 151 installed in parallel with the guide shafts 141 and 142 and having a threaded outer surface 152 , a stepping motor 150 for rotating the lead screw 151 , and a slider 160 that connects the optical pickup 120 and the lead screw 151 to convert the rotary force of the lead screw 151 to the linear motion so that the optical pickup 120 moves linearly in a radial direction of the optical disk 103 .
  • the stepping motor 150 , the spindle motor 110 , and the guide shafts 141 and 142 are installed at the sub-chassis 101 .
  • the optical pickup 120 is slidingly installed at the guide shafts 141 and 142 . Since the stepping motor 150 , the spindle motor 110 , the guide shafts 141 and 142 , and the sub-chassis 101 are made of a conductive material, a vibration produced during rotation of the stepping motor 150 and the spindle motor 110 may cause malfunction of the optical pickup 120 .
  • a leakage current from the stepping motor 150 and the spindle motor 110 may be transmitted to the optical pickup 120 via the sub-chassis 101 and the guide shafts 141 and 142 , which adversely affects the optical pickup 120 .
  • an optical pickup moving mechanism including guide shafts provided with an insulator that can prevent the transmission of a noise or a leakage current from a spindle motor and a stepping motor to an optical pickup.
  • an optical pickup moving mechanism to move an optical pickup which operates on a disk including: a stepping motor; a lead screw rotatably connected to the stepping motor and moving the optical pickup in a radial direction of the disk; and a plurality of guide shafts installed in parallel with the lead screw and guiding the movement of the optical pickup in a radial direction of the disk, each of the guide shafts including an insulator to insulate an electrical impact and vibration received from the stepping motor to prevent transmission of the electrical impact and the vibration to the optical pickup.
  • the insulator may be of a cap shape to be inserted into both ends of each of the guide shafts.
  • FIG. 1 is a rear view that illustrates an example of a conventional sub-chassis assembly
  • FIG. 2 is a schematic perspective view of a disk drive including an optical pickup moving mechanism for use with the embodiments of the invention
  • FIG. 3 is a perspective view of guide shafts according to a first embodiment of the present invention.
  • FIG. 4 is a perspective view that illustrates the fixation of the guide shafts of FIG. 3 to a base chassis
  • FIG. 5 is a side sectional view that illustrates the fixation of the guide shafts of FIG. 3 to the base chassis;
  • FIG. 6 is a cross-sectional view of guide shafts according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of guide shafts according to a third embodiment of the present invention.
  • a disk drive 200 includes a main frame 210 , a tray 220 removably installed at the main frame 210 and having a receiving portion 221 to receive a disk D, a base chassis 240 supported by a sub frame 230 installed at the main frame 210 to move upward and downward, and an optical pickup moving mechanism that linearly moves an optical pickup 243 in a radial direction of the disk D.
  • the base chassis 240 is provided with a turntable 241 on which the disk D received in the tray 220 is loaded, a spindle motor 242 installed coaxially with the turntable 241 to rotate the turntable 241 , and the optical pickup 243 that linearly moves in a radial direction of the disk D to write and read information to and from the disk D.
  • the optical pickup moving mechanism includes a stepping motor 244 , a lead screw 245 connected to the stepping motor 244 and linearly moving the optical pickup 243 in a radial direction of the disk D, and a plurality of guide shafts 246 and 247 installed at the base chassis 240 to be parallel with the lead screw 245 and to guide the movement of the optical pickup 243 in a radial direction of the disk D.
  • Each of the guide shafts 246 and 247 is provided with an insulator (described below) to insulate an electrical impact and vibration to prevent the transmission of the electrical impact and vibration to the optical pickup 243 .
  • an insulator 250 according to a first embodiment of the present invention has a cap shape to be inserted onto both ends of each of the guide shafts 246 and 247 .
  • both ends of each of the guide shafts 246 and 247 are supported by a support member 248 extended from the base chassis 240 .
  • the support member 248 includes a plurality of projections 2482 spaced apart from each other to insert the insulator 250 into both ends thereof and a through-hole 2481 intended for insertion of a screw 2483 .
  • the insulator 250 is fixedly inserted in the support member 248 by downward pressing of an elastic member 2484 surrounding the insulator 250 together with the support member 248 and upward pressing of the screw 2483 inserted in the through-hole 2481 .
  • the insulator 250 is made of an insulating material able to prevent a current flow and absorb an external impact or vibration.
  • the insulator 250 can prevent a current flow to the guide shafts 246 and 247 . Consequently, a current flow to the optical pickup 243 slidingly installed at the guide shafts 246 and 247 can be prevented.
  • an insulator 260 is formed by molding or coating on both ends of each of the guide shafts 246 and 247 .
  • the insulator 260 insulates the guide shafts 246 and 247 from the support member 248 , the elastic member 2484 , and the screw 2483 to prevent a current flow to the optical pickup 243 .
  • an insulator 270 is formed by molding to cover an outer surface of each of the guide shafts 246 and 247 .
  • the insulator 270 may also be formed by coating an outer surface of each of the guide shafts 246 and 247 .
  • the insulator 270 is formed on the axial outer surface of each of the guide shafts 246 and 247 corresponding to a distance for linear motion of the optical pickup 243 .
  • both ends of each of the guide shafts 246 and 247 are supported by the support member 248 when the third embodiment of the insulator is applied.
  • the optical pickup 243 moves linearly along the guide shafts 246 and 247 in a state of contact with the insulator 270 .
  • the insulator 270 prevents a current flow to the optical pickup 243 .
  • an optical pickup moving mechanism of the present invention includes an insulator on both ends or an outer surface of each of guide shafts so that current or vibration from a base chassis cannot be transmitted to an optical pickup. Therefore, the reliability of the optical pickup can be enhanced.

Landscapes

  • Moving Of Heads (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
US11/038,028 2004-03-04 2005-01-21 Optical pickup moving mechanism and disk drive using the same Abandoned US20050198660A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2004-14589 2004-03-04
KR1020040014589A KR100555560B1 (ko) 2004-03-04 2004-03-04 광픽업이송장치 및 이를 채용한 디스크 드라이브

Publications (1)

Publication Number Publication Date
US20050198660A1 true US20050198660A1 (en) 2005-09-08

Family

ID=34910019

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/038,028 Abandoned US20050198660A1 (en) 2004-03-04 2005-01-21 Optical pickup moving mechanism and disk drive using the same

Country Status (4)

Country Link
US (1) US20050198660A1 (ja)
JP (1) JP2005251380A (ja)
KR (1) KR100555560B1 (ja)
CN (1) CN1307623C (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060087933A1 (en) * 2004-10-27 2006-04-27 Hon Hai Precision Industry Co., Ltd. Supporting mechanism for optical pickup head
US20070127324A1 (en) * 2005-12-06 2007-06-07 Yukio Katou Optical disc apparatus
US20080320507A1 (en) * 2007-06-19 2008-12-25 Seiichi Katou Optical Disk Apparatus
US20120227062A1 (en) * 2011-03-01 2012-09-06 Philips & Lite-On Digital Solutions Corporation Optical pick-up head module

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063548A (en) * 1988-05-13 1991-11-05 Kabushiki Kaisha Toshiba Information processing apparatus
US5933406A (en) * 1994-11-02 1999-08-03 Olympus Optical Co., Ltd. Linear guide device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100261482B1 (ko) * 1997-05-28 2000-07-01 윤종용 픽업 이송 장치
TW440048U (en) * 1999-07-01 2001-06-07 Ind Tech Res Inst Mechanism for adjusting the guiding rod of the pickup head of a CD drive
CN2496106Y (zh) * 2001-08-13 2002-06-19 建兴电子科技股份有限公司 光驱的光学头基座传动装置
US6590854B2 (en) * 2001-09-07 2003-07-08 Gold Summit International Technology Corp. Read-wrte head fine adjustment and driving structure
CN2596495Y (zh) * 2002-12-30 2003-12-31 华硕电脑股份有限公司 读写头干扰信号隔绝机构

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063548A (en) * 1988-05-13 1991-11-05 Kabushiki Kaisha Toshiba Information processing apparatus
US5933406A (en) * 1994-11-02 1999-08-03 Olympus Optical Co., Ltd. Linear guide device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060087933A1 (en) * 2004-10-27 2006-04-27 Hon Hai Precision Industry Co., Ltd. Supporting mechanism for optical pickup head
US7610591B2 (en) * 2004-10-27 2009-10-27 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Supporting mechanism for optical pickup head
US20070127324A1 (en) * 2005-12-06 2007-06-07 Yukio Katou Optical disc apparatus
US7765562B2 (en) * 2005-12-06 2010-07-27 Hitachi, Ltd. Optical disc apparatus with consistently differing guide shafts
US20080320507A1 (en) * 2007-06-19 2008-12-25 Seiichi Katou Optical Disk Apparatus
US8332881B2 (en) * 2007-06-19 2012-12-11 Hitachi, Ltd. Optical disc apparatus with support part configured to reduce vibrations
US20120227062A1 (en) * 2011-03-01 2012-09-06 Philips & Lite-On Digital Solutions Corporation Optical pick-up head module

Also Published As

Publication number Publication date
KR100555560B1 (ko) 2006-03-03
CN1664936A (zh) 2005-09-07
KR20050089261A (ko) 2005-09-08
CN1307623C (zh) 2007-03-28
JP2005251380A (ja) 2005-09-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, CHUNG-UNG;CHO, PIL-JE;JUNG, YOUNG-SUN;AND OTHERS;REEL/FRAME:016198/0591

Effective date: 20041222

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION